diff --git a/lib/vagrant/environment.rb b/lib/vagrant/environment.rb
index a584f3163..0f9bdee8e 100644
--- a/lib/vagrant/environment.rb
+++ b/lib/vagrant/environment.rb
@@ -126,9 +126,11 @@ module Vagrant
       @data_dir   = @home_path.join("data")
       @gems_path  = Vagrant::Bundler.instance.plugin_gem_path
       @tmp_path   = @home_path.join("tmp")
-      @aliases_path = @home_path.join("aliases")
       @machine_index_dir = @data_dir.join("machine-index")
 
+      @aliases_path = Pathname.new(ENV["VAGRANT_ALIAS_FILE"]).expand_path if ENV.key?("VAGRANT_ALIAS_FILE")
+      @aliases_path ||= @home_path.join("aliases")
+
       # Prepare the directories
       setup_home_path